Griddle Protection 1N (1-Flow) Nozzle – High Proximity
Application
The R-102 system uses four different nozzles for the protection
of griddles. One of the applications requires a 1-flow nozzle and
three of the applications require a 2-flow nozzle.
High Proximity Application:
35 in. to 40 in. (889 to 1016 mm)
above the cooking surface.
This high proximity application uses the 1N nozzle.
The nozzle is stamped with 1N indicating this is a one-flow
nozzle and must be counted as one flow number.
One 1N nozzle will protect a maximum cooking area of 1080 in.
2
(69677 mm
2
) with the maximum longest side of 36 in. (914 mm).
When using this nozzle for griddle protection, the nozzle must be
positioned along the cooking surface perimeter to a maximum of
2 in. (50 mm) inside the perimeter, and aimed to the midpoint of
the cooking surface. See Figure 4-39 and 4-40.
NOTICE
When using this type of griddle protection,
only five flow numbers are allowed on a 1.5
gal (5.7 L) system and only 11 flow numbers
are allowed on a 3 gal (11.4 L) system.
FIGURE 4-39
000241
FIGURE 4-40
000243
Griddle Protection 290 (2-Flow) Nozzle – High Proximity
Application
Option 1 – Nozzle Center Located
30 in. to 50 in. (762 mm to 1270 mm) above the cooking surface.
This high proximity application uses the 290 nozzle.
The nozzle is stamped with 290 indicating this is a 2-flow nozzle
and must be counted as two flow numbers.
One 290 nozzle will protect a maximum cooking area of 720 in.
2
(46451 mm
2
) with a maximum dimension of 30 in. (762 mm).
When using this nozzle for high proximity applications, the
nozzle must be positioned within 1 in. (25 mm) of the center
of the cooking surface and pointed vertically down. See Figure
4-41 and 4-42.
FIGURE 4-41
000244
FIGURE 4-42
000773
MIDPOINT OF
COOKING SURFACE
1N NOZZLE LOCATED ALONG
ANY SIDE OF GRIDDLE SURFACE WITHIN
0 – 2 IN. (0 – 50 mm) OF COOKING
SURFACE EDGE. NOZZLE MUST BE
AIMED AT MIDPOINT OF COOKING
SURFACE.
COOKING
SURFACE
EDGE
NOZZLE LOCATION
0 – 2 IN. (0 – 50 mm)
INSIDE PERIMETER
OF COOKING SURFACE
EDGE
OF
COOKING
SURFACE
40 IN.
(1016 mm)
MAXIMUM
HEIGHT
OF 1N
NOZZLE TIP
35 IN. (889 mm)
MINIMUM
HEIGHT
OF 1N
NOZZLE TIP
CENTER LINE OF GRIDDLE
SURFACE ± 1 IN. (25 mm)
IN
ANY DIRECTION
50 IN.
(1270 mm)
MAXIMUM
HEIGHT
OF 290
NOZZLE TIP
30 IN.
(762 mm)
MINIMUM
HEIGHT
OF 290
NOZZLE
TIP
CENTER OF GRIDDLE SURFACE
OR A
MAXIMUM DIMENSION OF 20.6 IN.
(523 mm) FROM NOZZLE CENTERLINE TO
FURTHEST CORNER OF GRIDDLE
NOZZLE
LOCATION
COOKING
AREA
1 IN. (25 mm)
MAXIMUM
COOKING
AREA
1 IN. (25 mm)
MAXIMUM
SECTION 4 – SYSTEM DESIGN
UL EX3470 ULC EX3470
PAGE 4-18 REV. 11 2014-SEP-01
R-102 Restaurant Fire Suppression Manual
